Activated coke (AC) loaded with various amounts Fe was prepared via impregnation method to investigate the effect of iron content on the denitrification performance at low temperature. The results showed that the Fe2O3/AC catalyst with 6wt% Fe addition exhibits the best NOx conversion rate, which reached 93.9% at 240℃, the NOx conversion rate of the catalyst are about 86% and 7% when there are 120?10?6 (vol) SO2 and 3.5vol% H2O, respectively. The pore sizes of these catalysts are less than 4 nm, and increase with the increasing of Fe loading. These catalysts are stable. Fe is mainly existed as γ-Fe2O3 which disperses on the catalyst surface. A certain amount of Fe2O3 on the AC surface increase the contents of Oβ and Fe3+, and provide more active sites, so the selective catalytic reduction (SCR) denitrification performance of the catalyst is improved.
Shoulai YIN Baozhong ZHU Yunlan SUN Zheng CAO Guang CHEN Ruqing JIANG Tianyu XU Feng LIU
. Low-temperature Selective Catalytic Reduction of NOx with Ammonia over Fe2O3/AC Catalysts[J]. The Chinese Journal of Process Engineering, 2018
, 18(2)
: 330
-336
.
DOI: 10.12034/j.issn.1009-606X.217251
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